/**
 * Request 0.0.6
 * @Class uni-app request网络请求库
 * @Author lu-ch
 * @Date 2019-07-08
 * @Email webwork.s@qq.com
 * **/
export default class Request {
	config = {
		baseUrl:'',
		header:{
			'Content-Type':'application/json;charset=UTF-8'
		},
		method:'GET',
		dataType:'json',
		responseType:'text',
		success(){
		},
		fail(){
		},
		complete(){
		}
	}

	static posUrl(url){ /* 判断url是否为绝对路径 */
		return /(http|https):\/\/([\w.]+\/?)\S*/.test(url)
	}

	interceptor = {
		request(f){
			if(f){
				Request.requestBeforeFun = f
			}
		},
		response(f){
			if(f){
				Request.requestComFun = f
			}
		}
	}

	static requestBeforeFun(config){
		return config
	}

	static requestComFun(response){
		return response
	}

	setConfig(f){
		this.config = f(this.config)
	}

	request(options = {}){
		options.baseUrl = options.baseUrl || this.config.baseUrl
		options.dataType = options.dataType || this.config.dataType
		options.url = Request.posUrl(options.url)?options.url:(options.baseUrl + options.url)
		options.data = options.data || {}
		options.header = options.header || this.config.header
		options.method = options.method || this.config.method
		return new Promise((resolve,reject) =>{
			let next = true
			let _config = null
			options.complete = (response) =>{
				let statusCode = response.statusCode
				response.config = _config
				response = Request.requestComFun(response)
				if(statusCode === 200){ // 成功
					resolve(response)
				}else{
					reject(response)
				}
			}
			let cancel = (t = 'handle cancel') =>{
				let err = {
					errMsg:t,
					config:afC
				}
				reject(err)
				next = false
			}
			let afC = {...this.config,...options}
			_config = {...afC,...Request.requestBeforeFun(afC,cancel)}
			if(! next) return
			uni.request(_config)
		})
	}

	get(url,data,options = {}){
		options.url = url
		options.data = data
		options.method = 'GET'
		return this.request(options)
	}

	post(url,data,options = {}){
		options.url = url
		options.data = JSON.stringify(data)
		options.method = 'POST'
		return this.request(options)
	}
}
